554 Report of the Entomologists of the 



application the leaf buds had just begun to swell. But very few 

 of the case-bearers were active. At the time of the second appli- 

 cation the young leaves were well started, while at the time of 

 the third application the young case-bearers were beginning to 

 eat holes through the leaves. 



From the first the effect of the treatment was plainly apparent. 

 At the time of the last treatment the treated trees were compara- 

 tively free from the insect, although others in the same orchard, 

 which had not been sprayed, plainly showed the effect of the 

 injurious work of this pest. 



Experiment No. 2. — On May 6, fifteen trees in the same or- 

 chard were sprayed with kerosene emulsion at a strength of one 

 part of the emulsion to ten parts of water. The application was 

 very thorough, the emulsion being applied until the trees were 

 dripping w^et. Although these trees were badly infested with 

 both the pistol-case-bearer and the cigar-case-bearer, the emul- 

 sion seemed to have no effect upon either insect. Possibly a 

 stronger emulsion would have penetrated the cases, but under the 

 circumstances, it would undoubtedly have been endangering the 

 trees to use a stronger emulsion, as the foliage was very tender 

 and the flower buds were nearly ready to burst. 



Experiment No. 3 consisted in trapping the moths with trap 

 lanterns. These were kept all summer in the orchard of Mr. 

 J. B. Colin nier, of North Parma, to whom we are indebted for aid 

 in this work. On the night of July 2, a large number of the 

 moths were captured and a few on succeeding nights. Examina- 

 tions in the laboratory showed that but few of the females con- 

 tained eggs, which would indicate that the eggs are usually laid 

 previous to this time, hence the trap lantern was of little value 

 as a means of combating this insect. 



Conclusions.— From the above experiments, we may conclude 

 that the pistol-case-bearer can be controlled by the thorough ap- 

 plication of Paris green at a strength of one pound to 150 gallons 

 of water. The first application should be made just before the 

 leaf buds begin to swell, the second about ten days later, and the 

 third about a week or ten days from that time. 



